Intent new_intent = new Intent(Intent.ACTION_MEDIA_BUTTON); 
new_intent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_HEADSETHOOK)); 
context.sendOrderedBroadcast(new_intent, null);

이부분 이해가 안되네요.ㅠ

해석좀 부탁드릴께요.ㅠ